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Brine transport in the subsurface :Analysis of mechanisms and implications for groundwater contamination

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Brine transport in the subsurface :
其他題名:	Analysis of mechanisms and implications for groundwater contamination
作者:	Flowers, Tracey Clark.
面頁冊數:	319 p.
附註:	Chair: James R. Hunt.
附註:	Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0955.
Contained By:	Dissertation Abstracts International65-02B.
標題:	Engineering, Environmental.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3121477
ISBN:	0496688286

Brine transport in the subsurface :Analysis of mechanisms and implications for groundwater contamination
Flowers, Tracey Clark.

Brine transport in the subsurface :Analysis of mechanisms and implications for groundwater contamination [electronic resource] - 319 p.

Chair: James R. Hunt.

Thesis (Ph.D.)--University of California, Berkeley, 2003.

Little is currently understood about the transport of brines in water saturated porous media. The ultimate objective of this research endeavor was to increase the understanding of brine fate by developing a comprehensive model describing the mixing behavior at stable and unstable brine/freshwater interfaces.

ISBN: 0496688286Subjects--Topical Terms:

212478
Engineering, Environmental.

Brine transport in the subsurface :Analysis of mechanisms and implications for groundwater contamination
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520 # $a Little is currently understood about the transport of brines in water saturated porous media. The ultimate objective of this research endeavor was to increase the understanding of brine fate by developing a comprehensive model describing the mixing behavior at stable and unstable brine/freshwater interfaces.
520 # $a The principle conclusions of this research effort are: (1) Stability. Gravitational and viscous forces do affect the stability of miscible displacements. A displacement is destabilized by gravitational forces if the heavier fluid overlies the lighter fluid and is stabilized otherwise. Also, a displacement is destabilized by viscous forces if the viscosity of the resident fluid is greater than the viscosity of the displacing fluid and is stabilized otherwise. Consequently, brine displacements are often destabilized by one force, yet stabilized by the other. The dominance of one force over the other is determined by the magnitude of the displacement velocity in relation to the magnitude of a parameter-dependent critical velocity: UC=kgrR -rD mR-mD where k is the permeability, g is gravitational acceleration, rho is the density, mu is the dynamic viscosity, and the subscripts R and D represent the resident and the displacing fluids, respectively. (2) Brine displacing freshwater. A series of one-dimensional displacements in which brine displaced ambient groundwater in the direction of gravity were conducted. These displacements were destabilized by gravitational forces, but stabilized by viscous forces. If the magnitude of the displacement velocity is greater than the magnitude of the critical velocity, then the stabilizing viscous force is dominant and mixing is suppressed. Conversely, if the magnitude of the displacement velocity is less than the magnitude of the critical velocity, then the destabilizing gravitational force is dominant and mixing is enhanced. (3) Freshwater displacing brine. A series of one-dimensional displacements in which ambient groundwater displaced brine in the direction of gravity were conducted. These displacements were stabilized by gravitational forces, but destabilized by viscous forces. If the magnitude of the displacement velocity is less than the magnitude of the critical velocity, then the stabilizing gravitational force is dominant and mixing is suppressed. Conversely, if the magnitude of the displacement velocity is greater than the magnitude of the critical velocity, then the destabilizing viscous force is dominant and mixing is enhanced. (Abstract shortened by UMI.)
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